clang's AddressSanitizer implementation adds redzones on either side of
alloca()ed buffers. These redzones are 32-byte aligned and at least 32
bytes long.
__asan_alloca_poison() is passed the size and address of the allocated
buffer, *excluding* the redzones on either side. The left redzone will
always be to the immediate left of this buffer; but AddressSanitizer may
need to add padding between the end of the buffer and the right redzone.
If there are any 8-byte chunks inside this padding, we should poison
those too.
__asan_allocas_unpoison() is just passed the top and bottom of the dynamic
stack area, so unpoisoning is simpler.
Link: http://lkml.kernel.org/r/20171204191735.132544-4-paullawrence@google.com
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull more xfs updates from Darrick Wong:
"As promised, here's a (much smaller) second pull request for the
second week of the merge cycle. This time around we have a couple
patches shutting off unsupported fs configurations, and a couple of
cleanups.
Last, we turn off EXPERIMENTAL for the reverse mapping btree, since
the primary downstream user of that information (online fsck) is now
upstream and I haven't seen any major failures in a few kernel
releases.
Summary:
- Print scrub build status in the xfs build info.
- Explicitly call out the remaining two scenarios where we don't
support reflink and never have.
- Remove EXPERIMENTAL tag from reverse mapping btree!"
* tag 'xfs-4.16-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: remove experimental tag for reverse mapping
xfs: don't allow reflink + realtime filesystems
xfs: don't allow DAX on reflink filesystems
xfs: add scrub to XFS_BUILD_OPTIONS
xfs: fix u32 type usage in sb validation function
Pull overlayfs updates from Miklos Szeredi:
"This work from Amir adds NFS export capability to overlayfs. NFS
exporting an overlay filesystem is a challange because we want to keep
track of any copy-up of a file or directory between encoding the file
handle and decoding it.
This is achieved by indexing copied up objects by lower layer file
handle. The index is already used for hard links, this patchset
extends the use to NFS file handle decoding"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs: (51 commits)
ovl: check ERR_PTR() return value from ovl_encode_fh()
ovl: fix regression in fsnotify of overlay merge dir
ovl: wire up NFS export operations
ovl: lookup indexed ancestor of lower dir
ovl: lookup connected ancestor of dir in inode cache
ovl: hash non-indexed dir by upper inode for NFS export
ovl: decode pure lower dir file handles
ovl: decode indexed dir file handles
ovl: decode lower file handles of unlinked but open files
ovl: decode indexed non-dir file handles
ovl: decode lower non-dir file handles
ovl: encode lower file handles
ovl: copy up before encoding non-connectable dir file handle
ovl: encode non-indexed upper file handles
ovl: decode connected upper dir file handles
ovl: decode pure upper file handles
ovl: encode pure upper file handles
ovl: document NFS export
vfs: factor out helpers d_instantiate_anon() and d_alloc_anon()
ovl: store 'has_upper' and 'opaque' as bit flags
...
Pull remoteproc updates from Bjorn Andersson:
"This contains a few bug fixes and a cleanup up of the resource-table
handling in the framework, which removes the need for drivers with no
resource table to provide a fake one"
* tag 'rproc-v4.16' of git://github.com/andersson/remoteproc:
remoteproc: Reset table_ptr on stop
remoteproc: Drop dangling find_rsc_table dummies
remoteproc: Move resource table load logic to find
remoteproc: Don't handle empty resource table
remoteproc: Merge rproc_ops and rproc_fw_ops
remoteproc: Clone rproc_ops in rproc_alloc()
remoteproc: Cache resource table size
remoteproc: Remove depricated crash completion
virtio_remoteproc: correct put_device virtio_device.dev
Pull rpmsg updates from Bjorn Andersson:
"This fixes a few issues found in the SMD and GLINK drivers and
corrects the handling of SMD channels that are found in an
(previously) unexpected state"
* tag 'rpmsg-v4.16' of git://github.com/andersson/remoteproc:
rpmsg: smd: Fix double unlock in __qcom_smd_send()
rpmsg: glink: Fix missing mutex_init() in qcom_glink_alloc_channel()
rpmsg: smd: Don't hold the tx lock during wait
rpmsg: smd: Fail send on a closed channel
rpmsg: smd: Wake up all waiters
rpmsg: smd: Create device for all channels
rpmsg: smd: Perform handshake during open
rpmsg: glink: smem: Ensure ordering during tx
drivers: rpmsg: remove duplicate includes
remoteproc: qcom: Use PTR_ERR_OR_ZERO() in glink prob
Pull MMC host fixes from Ulf Hansson:
- renesas_sdhi: Fix build error in case NO_DMA=y
- sdhci: Implement a bounce buffer to address throughput regressions
* tag 'mmc-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: MMC_SDHI_{SYS,INTERNAL}_DMAC should depend on HAS_DMA
mmc: sdhci: Implement an SDHCI-specific bounce buffer
Pull pwm updates from Thierry Reding:
"The Meson PWM controller driver gains support for the AXG series and a
minor bug is fixed for the STMPE driver.
To round things off, the class is now set for PWM channels exported
via sysfs which allows non-root access, provided that the system has
been configured accordingly"
* tag 'pwm/for-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: meson: Add clock source configuration for Meson-AXG
dt-bindings: pwm: Update bindings for the Meson-AXG
pwm: stmpe: Fix wrong register offset for hwpwm=2 case
pwm: Set class for exported channels in sysfs
The Mediatek ethernet driver fails to build after commit 23c35f48f5
("pinctrl: remove include file from <linux/device.h>") because it relies
on the pinctrl/consumer.h and pinctrl/devinfo.h being pulled in by the
device.h header implicitly.
Include these headers explicitly to avoid the build failure.
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The Meson GX MMC driver fails to build after commit 23c35f48f5
("pinctrl: remove include file from <linux/device.h>") because it relies
on the pinctrl/consumer.h being pulled in by the device.h header
implicitly.
Include the header explicitly to avoid the build failure.
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The Rockchip LVDS driver fails to build after commit 23c35f48f5
("pinctrl: remove include file from <linux/device.h>") because it relies
on the pinctrl/consumer.h and pinctrl/devinfo.h being pulled in by the
device.h header implicitly.
Include these headers explicitly to avoid the build failure.
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A re-factoring patch in NFS export series has passed the wrong argument
to ovl_get_inode() causing a regression in the very recent fix to
fsnotify of overlay merge dir.
The regression has caused merge directory inodes to be hashed by upper
instead of lower real inode, when NFS export and directory indexing is
disabled. That caused an inotify watch to become obsolete after directory
copy up and drop caches.
LTP test inotify07 was improved to catch this regression.
The regression also caused multiple redirect dirs to same origin not to
be detected on lookup with NFS export disabled. An xfstest was added to
cover this case.
Fixes: 0aceb53e73 ("ovl: do not pass overlay dentry to ovl_get_inode()")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Pull spectre/meltdown updates from Thomas Gleixner:
"The next round of updates related to melted spectrum:
- The initial set of spectre V1 mitigations:
- Array index speculation blocker and its usage for syscall,
fdtable and the n180211 driver.
- Speculation barrier and its usage in user access functions
- Make indirect calls in KVM speculation safe
- Blacklisting of known to be broken microcodes so IPBP/IBSR are not
touched.
- The initial IBPB support and its usage in context switch
- The exposure of the new speculation MSRs to KVM guests.
- A fix for a regression in x86/32 related to the cpu entry area
- Proper whitelisting for known to be safe CPUs from the mitigations.
- objtool fixes to deal proper with retpolines and alternatives
- Exclude __init functions from retpolines which speeds up the boot
process.
- Removal of the syscall64 fast path and related cleanups and
simplifications
- Removal of the unpatched paravirt mode which is yet another source
of indirect unproteced calls.
- A new and undisputed version of the module mismatch warning
- A couple of cleanup and correctness fixes all over the place
Yet another step towards full mitigation. There are a few things still
missing like the RBS underflow mitigation for Skylake and other small
details, but that's being worked on.
That said, I'm taking a belated christmas vacation for a week and hope
that everything is magically solved when I'm back on Feb 12th"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (37 commits)
KVM/SVM: Allow direct access to MSR_IA32_SPEC_CTRL
KVM/VMX: Allow direct access to MSR_IA32_SPEC_CTRL
KVM/VMX: Emulate MSR_IA32_ARCH_CAPABILITIES
KVM/x86: Add IBPB support
KVM/x86: Update the reverse_cpuid list to include CPUID_7_EDX
x86/speculation: Fix typo IBRS_ATT, which should be IBRS_ALL
x86/pti: Mark constant arrays as __initconst
x86/spectre: Simplify spectre_v2 command line parsing
x86/retpoline: Avoid retpolines for built-in __init functions
x86/kvm: Update spectre-v1 mitigation
KVM: VMX: make MSR bitmaps per-VCPU
x86/paravirt: Remove 'noreplace-paravirt' cmdline option
x86/speculation: Use Indirect Branch Prediction Barrier in context switch
x86/cpuid: Fix up "virtual" IBRS/IBPB/STIBP feature bits on Intel
x86/spectre: Fix spelling mistake: "vunerable"-> "vulnerable"
x86/spectre: Report get_user mitigation for spectre_v1
nl80211: Sanitize array index in parse_txq_params
vfs, fdtable: Prevent bounds-check bypass via speculative execution
x86/syscall: Sanitize syscall table de-references under speculation
x86/get_user: Use pointer masking to limit speculation
...
Pull x86 fixes from Thomas Gleixner:
"A small set of changes:
- a fixup for kexec related to 5-level paging mode. That covers most
of the cases except kexec from a 5-level kernel to a 4-level
kernel. The latter needs more work and is going to come in 4.17
- two trivial fixes for build warnings triggered by LTO and gcc-8"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/power: Fix swsusp_arch_resume prototype
x86/dumpstack: Avoid uninitlized variable
x86/kexec: Make kexec (mostly) work in 5-level paging mode
Pull irq fixes from Thomas Gleixner:
"Two small changes:
- a fix for a interrupt regression caused by the vector management
changes in 4.15 affecting museum pieces which rely on interrupt
probing for legacy (e.g. parallel port) devices.
One of the startup calls in the autoprobe code was not changed to
the new activate_and_startup() function resulting in a warning and
as a consequence failing to discover the device interrupt.
- a trivial update to the copyright/license header of the STM32 irq
chip driver"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq: Make legacy autoprobing work again
irqchip/stm32: Fix copyright
Pull more block updates from Jens Axboe:
"Most of this is fixes and not new code/features:
- skd fix from Arnd, fixing a build error dependent on sla allocator
type.
- blk-mq scheduler discard merging fixes, one from me and one from
Keith. This fixes a segment miscalculation for blk-mq-sched, where
we mistakenly think two segments are physically contigious even
though the request isn't carrying real data. Also fixes a bio-to-rq
merge case.
- Don't re-set a bit on the buffer_head flags, if it's already set.
This can cause scalability concerns on bigger machines and
workloads. From Kemi Wang.
- Add BLK_STS_DEV_RESOURCE return value to blk-mq, allowing us to
distuingish between a local (device related) resource starvation
and a global one. The latter might happen without IO being in
flight, so it has to be handled a bit differently. From Ming"
* tag 'for-linus-20180204' of git://git.kernel.dk/linux-block:
block: skd: fix incorrect linux/slab_def.h inclusion
buffer: Avoid setting buffer bits that are already set
blk-mq-sched: Enable merging discard bio into request
blk-mq: fix discard merge with scheduler attached
blk-mq: introduce BLK_STS_DEV_RESOURCE
Pull NTB updates from Jon Mason:
"Bug fixes galore, removal of the ntb atom driver, and updates to the
ntb tools and tests to support the multi-port interface"
* tag 'ntb-4.16' of git://github.com/jonmason/ntb: (37 commits)
NTB: ntb_perf: fix cast to restricted __le32
ntb_perf: Fix an error code in perf_copy_chunk()
ntb_hw_switchtec: Make function switchtec_ntb_remove() static
NTB: ntb_tool: fix memory leak on 'buf' on error exit path
NTB: ntb_perf: fix printing of resource_size_t
NTB: ntb_hw_idt: Set NTB_TOPO_SWITCH topology
NTB: ntb_test: Update ntb_perf tests
NTB: ntb_test: Update ntb_tool MW tests
NTB: ntb_test: Add ntb_tool Message tests
NTB: ntb_test: Update ntb_tool Scratchpad tests
NTB: ntb_test: Update ntb_tool DB tests
NTB: ntb_test: Update ntb_tool link tests
NTB: ntb_test: Add ntb_tool port tests
NTB: ntb_test: Safely use paths with whitespace
NTB: ntb_perf: Add full multi-port NTB API support
NTB: ntb_tool: Add full multi-port NTB API support
NTB: ntb_pp: Add full multi-port NTB API support
NTB: Fix UB/bug in ntb_mw_get_align()
NTB: Set dma mask and dma coherent mask to NTB devices
NTB: Rename NTB messaging API methods
...
Pull mailbox updates from Jassi Brar:
"Misc driver changes only:
- TI-MsgMgr: Fix print format for a printk
- TI-MSgMgr: SPDX license switch for the driver
- QCOM-IPC: Convert driver to use regmap
- QCOM-IPC: Spawn sibling clock device from mailbox driver"
* tag 'mailbox-v4.16' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
dt-bindings: mailbox: qcom: Document the APCS clock binding
mailbox: qcom: Create APCS child device for clock controller
mailbox: qcom: Convert APCS IPC driver to use regmap
mailbox: ti-msgmgr: Use %zu for size_t print format
mailbox: ti-msgmgr: Switch to SPDX Licensing
Pull i2c updates from Wolfram Sang:
"I2C has the following changes for you:
- new flag to mark DMA safe buffers in i2c_msg. Also, some
infrastructure around it. And docs.
- huge refactoring of the at24 driver led by the new maintainer
Bartosz
- update I2C bus recovery to send STOP after recovery
- conversion from gpio to gpiod for I2C bus recovery
- adding a fault-injector to the i2c-gpio driver
- lots of small driver improvements, and bigger ones to
i2c-sh_mobile"
* 'i2c/for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (99 commits)
i2c: mv64xxx: Add myself as maintainer for this driver
i2c: mv64xxx: Fix clock resource by adding an optional bus clock
i2c: mv64xxx: Remove useless test before clk_disable_unprepare
i2c: mxs: use true and false for boolean values
i2c: meson: update doc description to fix build warnings
i2c: meson: add configurable divider factors
dt-bindings: i2c: update documentation for the Meson-AXG
i2c: imx-lpi2c: add runtime pm support
i2c: rcar: fix some trivial typos in comments
i2c: davinci: fix the cpufreq transition
i2c: rk3x: add proper kerneldoc header
i2c: rk3x: account for const type of of_device_id.data
i2c: acorn: remove outdated path from file header
i2c: acorn: add MODULE_LICENSE tag
i2c: rcar: implement bus recovery
i2c: send STOP after successful bus recovery
i2c: ensure SDA is released in recovery if SDA is controllable
i2c: add 'set_sda' to bus_recovery_info
i2c: add identifier in declarations for i2c_bus_recovery
i2c: make kerneldoc about bus recovery more precise
...
Pull fscrypt updates from Ted Ts'o:
"Refactor support for encrypted symlinks to move common code to fscrypt"
Ted also points out about the merge:
"This makes the f2fs symlink code use the fscrypt_encrypt_symlink()
from the fscrypt tree. This will end up dropping the kzalloc() ->
f2fs_kzalloc() change, which means the fscrypt-specific allocation
won't get tested by f2fs's kmalloc error injection system; which is
fine"
* tag 'fscrypt_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/fscrypt: (26 commits)
fscrypt: fix build with pre-4.6 gcc versions
fscrypt: remove 'ci' parameter from fscrypt_put_encryption_info()
fscrypt: document symlink length restriction
fscrypt: fix up fscrypt_fname_encrypted_size() for internal use
fscrypt: define fscrypt_fname_alloc_buffer() to be for presented names
fscrypt: calculate NUL-padding length in one place only
fscrypt: move fscrypt_symlink_data to fscrypt_private.h
fscrypt: remove fscrypt_fname_usr_to_disk()
ubifs: switch to fscrypt_get_symlink()
ubifs: switch to fscrypt ->symlink() helper functions
ubifs: free the encrypted symlink target
f2fs: switch to fscrypt_get_symlink()
f2fs: switch to fscrypt ->symlink() helper functions
ext4: switch to fscrypt_get_symlink()
ext4: switch to fscrypt ->symlink() helper functions
fscrypt: new helper function - fscrypt_get_symlink()
fscrypt: new helper functions for ->symlink()
fscrypt: trim down fscrypt.h includes
fscrypt: move fscrypt_is_dot_dotdot() to fs/crypto/fname.c
fscrypt: move fscrypt_valid_enc_modes() to fscrypt_private.h
...
Paul Lawrence
Andrey Ryabinin
Andrey Konovalov
Linus Torvalds
Thierry Reding
Stephen Rothwell
Amir Goldstein